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TypedArray.BYTESPERELEMENT

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The TypedArray.BYTES_PER_ELEMENT static data property represents the size in bytes of each element in a typed array.

{{InteractiveExample("JavaScript Demo: TypedArray.BYTES_PER_ELEMENT", "shorter")}}

```js interactive-example console.log(Float64Array.BYTES_PER_ELEMENT); // Expected output: 8

console.log(Int8Array.BYTES_PER_ELEMENT); // Expected output: 1

## Value

A number whose value depends on the type of `TypedArray`.

{{js_property_attributes(0, 0, 0)}}

## Description

`TypedArray` objects differ from each other in the number of bytes per element and in the way the bytes are interpreted. The `BYTES_PER_ELEMENT` constant contains the number of bytes each element in the given `TypedArray` has.

The `BYTES_PER_ELEMENT` property is both an _instance property_ and a _static property_. It's available on both `TypedArray` subclass constructors and on instances of those constructors.

As an instance property, `BYTES_PER_ELEMENT` is defined on the constructor's `prototype`.

```js
console.log(Object.hasOwn(Int8Array.prototype, "BYTES_PER_ELEMENT")); // true

Examples#

Using BYTES_PER_ELEMENT#

As a static property:

Int8Array.BYTES_PER_ELEMENT; // 1
Uint8Array.BYTES_PER_ELEMENT; // 1
Uint8ClampedArray.BYTES_PER_ELEMENT; // 1
Int16Array.BYTES_PER_ELEMENT; // 2
Uint16Array.BYTES_PER_ELEMENT; // 2
Float16Array.BYTES_PER_ELEMENT; // 2
Int32Array.BYTES_PER_ELEMENT; // 4
Uint32Array.BYTES_PER_ELEMENT; // 4
Float32Array.BYTES_PER_ELEMENT; // 4
Float64Array.BYTES_PER_ELEMENT; // 8
BigInt64Array.BYTES_PER_ELEMENT; // 8
BigUint64Array.BYTES_PER_ELEMENT; // 8

As an instance property:

new Int8Array([]).BYTES_PER_ELEMENT; // 1
new Uint8Array([]).BYTES_PER_ELEMENT; // 1
new Uint8ClampedArray([]).BYTES_PER_ELEMENT; // 1
new Int16Array([]).BYTES_PER_ELEMENT; // 2
new Uint16Array([]).BYTES_PER_ELEMENT; // 2
new Float16Array([]).BYTES_PER_ELEMENT; // 2
new Int32Array([]).BYTES_PER_ELEMENT; // 4
new Uint32Array([]).BYTES_PER_ELEMENT; // 4
new Float32Array([]).BYTES_PER_ELEMENT; // 4
new Float64Array([]).BYTES_PER_ELEMENT; // 8
new BigInt64Array([]).BYTES_PER_ELEMENT; // 8
new BigUint64Array([]).BYTES_PER_ELEMENT; // 8

Specifications#

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Browser compatibility#

{{Compat}}

See also#